extension rods integral rods drill bits coal mine steel
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Product Description
Our factory specializes in manufacturing many kinds of drilling bits, includes chisel type bits, cross type bits, button bits, tapered drill rods and integral drill rods, extension rods, shank adapter rods, pneumatic drilling rods etc,. Mainly used for mining, coal cutting, tunneling, rock cutting in quarrying, transportation and irrigation projects. Welcome to visit our website to get more information.